Bicycle-pump.



E. .N. GARRISON.

BICYCLE PUMP.

APBLIOATION FILED APlLz, 1912.

INVENTOR WTNESSES.'

A TTORNE Y STM Elm-Amma MTION 0F CONNECTNUI.

, CONNECTICUT., LSSIGNOSl T0 THE OE- UFBBDG'EPORT, CONNECTICUT, A CORPO- V BICYCLE-Pm.

Specification of Letten .latent.

amaba mea .Apru 2e, ma semi necesa.

To all fwtom, t may concern Beit known that' I, EDWARD N. GARmson, s

-a citizen of the United States, residing at'.

Bridgeport, county of Fairfield, State of Connecticut, have invented an Improvement in Bicycle-Pumps, of which the following is a specification.

This invention has for its object to provide a simple and inexpensive bicycle pump so constructed as to do away with the use of solder in securing the parts together. This I accomplish by a novel construction and arrangement of the parts which are secured together by mechanical operations only, thereby providing a very stron and serviceable pump `and at a greatly re uced cost of construction.

With these and other objects in view, I have devised the novel bicycle pump which I will now describe, referring to the accompanying drawing f ormin a part of this specification and using re erence characters to indicate the several parts.

Figure 1 is an elevation of my novel pump, partly broken away to show the construction of the upper end thereof;4 and Fig. 2 is a view showing the construction of the lower end thereof.

10 denotes the cylinder, 11 the handle which is adapted to slide over the upper end of the cylinder in its forward position, 12 a tubular piston rod and 13 the piston. The upper end of the cylinder is provided with a rolled thread and is closed by a cap 14 having a corresponding thread which engages the thread on the cylinder internally. The cap is provided with a central hole, the surrounding metal being turned inward to form a flange 15 which furnishes a firm support for the piston rod. In order-to provide a firm and rigid means of attaching the handle to the piston rod, I upset the tubular piston rod endwise to form, or otherwise form upon said rod, an external rib or shoulder 16. This rib supports a washer 17, which is provided with a central hole through which the piston rod passes. Above the washer and surrounding the piston rod is a spacin sleeve 18. The upper end of the handle 1s closed inward over the top of the sleeve and into engagement with the piston rod, which passes through the end of the handle and is closed over outward upon the. top of the handle, as at 19. I thereby efectually brace and strengthen the handle and rovide a rigid attachment of the handle to t e `tubular piston rod. The lower .end of the tubular piston rod is flanged outward .as .at 20. A

21 denotes a washer having an inwardly extending threaded ilange 22 which lies .within the piston rod. This washer lies intermediate the piston and the flangedend of the piston rod andin contact with both. The-washer is rigidly securedl to the flanged end of the piston rod by means of a locking Patented Abr. 15,1913.

washer 23 which is closed under washer 21 and over the flange on the piston rod. The iston, which is an ordinary bucket piston, 1s secured to the piston rod b'y means of a screw 24 which passes through the piston and engages the threaded flange of the washer.

The operation is as usual in pumps of this type. On the upstroke, air enters the cylinder freely and passes the piston. On the down-stroke the piston expands and cxpels the air from the cylinder through opening 25 at the bottom of the cylinder, which is shown as provided with a threaded inturned flange 26 for the attachment of a tube or suitable air. connection.

Having thus described my invention, I l

claim:

1. Ina pump, the combination with a handle and a tubular piston rod having anexternal rib, of a washer resting on said rib and a collar resting on the washer, said parts being secured together by closing the top of the handle inward over the collar and against the tubular piston rod and closing the upper end of the piston rod over outward upon the top of the handle.

2. In a pump, the combination with a cylinder threaded at its upper end, a cap engaging said. cylinder and provided with a central hole, of a handle, a tubular piston `rod passing through the hole in the cap and provided with an external rib, a-washer resting on said rib and a spacing sleeve resting upon the washer, the handle being secured to the piston rod by closing the upper end of the handle inwardV over the sleeve and against the piston rod and closing the upper -end of the piston rod over outward upon said ange and having an internally threaded boss extending into said piston rod, a lockingwasher uniting said rstmentioned Washer to said fiange, a piston, and a screw 5 passing through said piston and engaging said threaded boss.

4. In a pump, the combination with a piston'rod and an operating handle secured to the upper end thereof, of a Washer having 10 an internally threaded boss extending into the other end of said piston rod, means for securing said washer to said piston rod, a piston, and a. screw passing through said piston and engaging said threaded boss.

In testimony whereof I aflix my signature 15 in presence of two witnesses.

EDWARD N. GARRISON. Witnesses:

S. W. ATHERTON, M. L. HAGGEMAN. 

